In 1970 the mine was designed by the Nanchang Nonferrous Metallurgy Design and Research Institute, designed to scale 1500t / d.
First, the nature of the ore: Yichun Ta-Nb based feldspar mineral of sodium - greisenization - lepidolite granite type containing tantalum, niobium, lithium, rubidium, cesium, beryllium various large deposits of rare metals. The ore of the main ore body has three kinds of ore types: residual slope type - topsoil, weathering type - weathered, semi-weathered ore and primary ore. The change of ore is gradually weakened according to the degree of sodiumation from top to bottom. The content of useful elements of strontium, barium, lithium, strontium and strontium gradually decreases. The size of the useful minerals gradually becomes finer, and the hardness of the ore becomes harder. Symbiotic minerals Correspondingly complex, the dispersion rate of the main useful elements 钽 and 铌 is increased. Tantalum and niobium-rich minerals are mainly iron manganese tantalum and niobium ore, microlite, tantalum-containing cassiterite. Lithium minerals are mainly lithium mica. The strontium minerals are mainly beryl and sodium phosphite . Most of the cockroaches and cockroaches are found in lithium mica. The gangue minerals are mainly feldspar and quartz . Small amounts of other minerals are topaz, magnetite, hematite, titanium, iron ore, manganese ore, apatite. The multi-element analysis of ore is shown in Table 1. Table 1 Multi-element analysis of ore
| element | SiO 2 | Al 2 O 3 | Na 2 O | K 2 O | Fe 2 O 3 | MgO | CaO | MnO | Li 2 O | Rb 2 O | Cs 2 O | BeO |
| content,% | 65.53 | 18.33 | 4.70 | 2.00 | 1.16 | 0.41 | 0.16 | 0.11 | 1.08 | 0.30 | 0.092 | 0.03 |
| element | Nb 2 O 3 | Ta 2 O 3 | SnO 2 | TiO 2 | ZrO 2 | U 3 O 8 | ThO 2 | P 2 O 5 | WO 3 | S | Ga | Cd |
| content,% | 0.0105 | 0.016 | 0.012 | 0.012 | 0.003 | 0.00066 | 0.001 | 0.43 | 0.005 | mark | 0.0044 | 0.005 |
Inlaid particle size of useful minerals: manganese-rich coltan and strontium-containing sillimanite are generally 0.3-0.1 mm, fine-grain is generally 0.2-0.08 mm, lithium mica is generally 0.4-0.1 mm, and ore is broken to 0.3 mm. , useful mineral monomers began to appear, with a mineral dissociation degree of more than 90% when broken to 0.1mm. In the early stage, the content of ore ore in the strong sodium ore body was much higher, and the content of the ore in the ore was less than 0.074mm, which was 11.37%. The raw ore contains cerium oxide as 0 0276%, the cerium ratio is 1.76, and the dilithium oxide content is 1.2%. The natural rest angle of the ore is 40°; the Platt hardness is f=10~12; and the internal friction angle is 29°31′. The mineral density is shown in Table 2.
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